var _base;

(_base = Array.prototype).indexOf || (_base.indexOf = function(item) {
    var i, x, _i, _len;
    for (i = _i = 0, _len = this.length; _i < _len; i = ++_i) {
        x = this[i];
        if (x === item) {
            return i;
        }
    }
    return -1;
});
